Typewriting and like machine



June 22 1926. i,589,72 5

' R. H. STROTHER 'TYPEWRITING AND LIKE MACHINE 1,925 3 Sheets-Sheet 1 Filed Feb. 9

INVENTOR ATTORNEY "Ju e 22 1926. 1,589,725;

R. H. STROTHER TYPBWRITING AND LIKE MACHINE Filed Feb. 9, 1925 3 Sheets-Sheet 2 "INVENTQR ATTOR NEY June 22 1926.

R. H. STROTHER TYPBWRITING AND LIKE MACHINE Filed Feb. 9, 1925 .3 Sheets-Sheet 5 O T N ..E V N ATTORNEY Patented June 22,1926. v v 1,589,522

UNITED STATES PATENT OFFICE.

ROBERT H. S'IRQTHER, OF MONTCLAIR, NEW JERSEY, ASSIGNbR T REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING AND LIKE MACHINE.

Application filed February 9, 1925. Serial No. 7,937. My invention relates to typewriting niameans of roller bearings 6. This carriage chines, and more particularly to certain imis equipped with the usual platen and other provei'nents in power mechanism for returnpaper feed devices and it is fed to the left 'ing the carriage of a. typewriting or similar by a spring drum under the control of the 1,567,590 dated Dec. 29, 19:35, and it has for arrest the rightward travel of some ofthe control mechanism of the Hart of the carriage,or

and particularly pointed out in the claims. present mechanism;

typewriter.

work of this machine includes a has. 1. ruorflexible and detachable cou machine. usual escapement and, if desired, tabulator My invention is in the nature of an lllldevices; but these things are not necessary provement on or modification of the carriage to be shown in the present case. There is return mechanism shown and described in shown, however, at the front of the carriage the application of Frederick A. Hart liled a margin stop 7' to arrest the leftward travel Feb. 0, 1925, Six, l\'o., 7,213, new Patent No. of the carriage and another margin stop 8 to the carriage, nt rail or bar rather on a special toothed machine, and to provide an improved form bar 10 mounted on said front bar for the of safeguard against certain mis-operations purpose. These two margin stops are adof the machine, as will be more fully cxjustable by manipulation of handles 11 so plained hereinafter. as to bring about the arrest of the carriage To the above and other ends my invention at any desired letter space position. These consists in certain features of construction stops are the ordinary Remington margin and combinations and arrangements of parts, stops except that'their abutting parts have all of which will be fully set forth herein been slightly modih'ed to adapt them to the butas far as my inln the accompanying drawings, vention is concerned, these margin stops can Figure l is a left-hand side elevation, he of any suitable sort. fragmentary in character, and with parts in The Hart carriage return mechanism, on section and parts broken away, of a typewhich the present invention is designed as writing machine and carriage returning .an improvement, includes a rack bar 12 mechanism having 'my invention embodied mounted by means of bolts 13 on the under 8t therein. side of the rear bar or rail of the carriage, Figure 2 1s a front elevation of similar the teeth being on the rear edge of the bar character. and meshing with a pinion l-l mounted on Figure 3 is a fragmentary plan view of the upper endof .a vertical drive shaft 15. some of the mechanism at the front of the The drive mechanism, including this shaft and pinion, is for th most part mounted in Figure 4 is a sectional view of some of the a single casting 10 which at its upper end mechanism, this figure being more or less projects through a suitable hole in the top in thc nature of u left ward extension of plate 3 and at its lower part is secured, not Figure 1. line shown, to the base i of the typewriter 9.0 Figure is a perspective view of a part of frame work. The shaft 15 is journaled at the mechanism. its upper end in the upper part of the ca'st- Figure (3 is a view in taansverse vertical ing 16 and at its lower end in a bracket 17 section, on the line (i, (3 of Figure l and look; integral with said casting. Loosely mounted i-ng toward the rear. l on the shaft 15 is a beveled gear 18 in conigure 7 is a detail with parts in section stant mesh with a. beveled pinion 20 which on the line 7, T of Figure 1 and looking tolis fast on the forward end of a horizontal ward the rear. drive shaft 21, which shaft is suitably jour- .\ly invention is shown applied to a Remnaled in the upright part of the casting l0 ington No. 12 typewriter. 'llul'maii frameand has mounted on its rear end part of a too pling comprisner posts 2 and a top plate 3 on which ing a disk 22 with ins 23 projecting rearlasl are mounted stationary rails 4 alohg ward therefruif, in electric ihotor 24 is which a carriage 5 is adapted to travel by mounted on the rear\shelf of the casting 16 its principal objects to simplify somewhat these being mounted on the fro forward end of an and on its armature shaft is mountedacompanion part of the flexible coupling comprising a disk 25 having pins 26 projecting forward therefrom. An endless. leather band 27 is woven in and out between the pins 23 and 26 and transmits the power of the motor to the shaft 21.

The'beveled gear 18 runs between two small rollers or wheels, the upper one, 28, of which is journaled on the reduced projecting end of the shaft 21, this wheel running on a flattened part of the gear and preventing upward motion thereof. Downward motion of the gear is prevented by the other wheel 30, which is journaled on the reduced end of a pin or rod 31 which passes through a suitable hole in the casting 16 and is secured in place by a set screw 32. Ihe hub of the gear 18 constitutes one member of a clutch, said hub having clutch teeth 33 projecting downward therefrom in position to co-operate with clutch teeth 34 projecting upward from the lower clutch member 35. The part of the shaft below the gear 18 is squared and this clutch member 35 is slidable up and down on that part of the shaft. The means for so sliding it comprises a roller 36 running in a peripheral groove in the clutch member 35, said roller being journaled on a pin'or stud on the arm 37, the split hub 38 of which is secured by means of a binding screw 40 on the right-hand end of a rock shaft 41. Said rock shaft is journaled near said right-hand end in a lug of the casting 16. It will be perceived that the clutch can be closed by rocking the shaft 41. It is so closed by a spring 42 coiled about a rod 43, which rod is pivoted to the lower end of an arm 44 projecting downward from the shaft 41 and being in fact a branch of the arm 37. As shown in Fig. 4 this rod 43 extends rearward into a box-like part 45 of the casting 16 beneath the shelf on which the motor 24 rests, and the s ring 42 is compressedlbetween a nut 46 5 so that the power of the spring is exerted to close the clutch.

Much of the control mechanism for the carriage returnmechanism is included in whatmay be called a control box 47, this being a cast iron box open at its left-hand side and mounted by means of screws 48 in the outside of the tvpewriter frame on the left thereof, said screws bein threaded into the osts 2 and base 1. In *ig. 1-the upper leftand part of this box is broken away to show mechanism behind it and the bearing for the left-hand end of the shaft 41 therefore does not show in" the drawing, but in the machine said shaft takes a bearing in a rearward extending bracket cast on the box 47 for the purpose. At its left-hand end said shaft has an arm 50 mounted there- Fig. 1) on the rod 43 and the front wall of this box on and secured by a screw 51, said arm extending through a hole made for the pur pose into the interior of the box 47. A latch 52 pivoted on a stud 53 inside the box 47 normally engages the forward end of the arm 50 and holds said arm and the lower clutch member 35 down against the pressure of the spring 42. The latch is moved to latching position by a spring 54 secured thereto and to a post 55; when this latch,

is released said spring closes the clutch and also closes the circuit of the motor.

The motor circuit is controlled directly by the rod 43 which at its rear end normally presses against a block of insulated material 59 mounted on the upper endof a spring conductor 56 having a contact point 57 thereon. The rod normally holds this point away from another contact point 58 mounted on the upper end of another conductor 60. These two conductors 56 and 60 are secured by screws 61 to a block 62 of insulating material fastened to the inside of the chamber 45. When the latch 52 is released and the spring 42, pushing the rod 43 frontward, allows the circuit to close at 57, 58 and the motor begins to turn and to run the carriage back to the right. It will be perceived that it might sometimes happen that the clutch teeth 34 stood directly beneath the clutch teeth 33 so that the sprin would be unable to close the clutch. or this reason the rod 43 is so adjusted as to close the circuit at 57, 58 before the clutch teeth come quite into engagement, with the result that if said clutch teeth should clash as above mentioned, the motor would start nevertheless, and as soon as it did the teeth 33 would move from over the teeth 34 and allow the clutch to close. If the circuit was not closed until after the clutch was closed, the motor would not start at all and the operator might think that the mechanism was out of order. 1

The mechanism at the front of the carriage for co-operat-ion with the margin stops 7 and 8, includes a rod 63 lying parallel with the run of the carriage, and at its righthand end journaled in a bracket 64 secured by screws 65 to the stationary front rail 4. This rod extends leftward and at its lefthand end is pivoted at 66 to the upright arm of a bell crank 67, which bell crank is secured by a screw68 to the end of a short rock shaft 70, which is journaled in a casting or bracket 71, which by means of a screw 72 is secured to the top plate 3. 63 projects through the bracket 64 and on its extreme right-hand end there is rigidly mounted an arm 73 which stands in the path of the margin stop 7. This arm normally stands in the position shown in Figs. 2 and 3 2. little to the right of the bracket 64, so that in the last letter space step of the caralso closes the clutch,

The slide rod lid riage the stop 7 can push said arm a short distance leftward, whereupon said arm and the carriage itself will be arrested by-said bracket.

A suitable distance to the left of said bracket 64 the slide rod 63 has n'gidly mounted thereon another arm 74 which stands in the path of travel of the margin stop 8. In the last part of the return motion of the carriage said margin stop, striking this arm 74, moves it and the rod ($3 rightward until said arm and the carriage are arrested by the bracket 64. As will presently appear, means .are provided whereby leftward'motion of the rod 63 produced by the margin stop 7 trips the latch 52 to set the motor into operation, and means are operated by the rightward motion ofthe rod (3.3 to pull down the arm 50 and thus stop the motor and disconnect it from the carriage.

The horizontal arm of the bell crank 67 is pivoted at 7 5 to the upper end of a link 76,

pivoted at its right-hand end in the wall of the box and at its left-hand end in a bracket piece 83 having an angled form shown in clined rearward from the shaft. The arm 86 is of the built-up construction shown in the drawings but this is for reasons connected with certain features of the Hart invention which are not shown herein. The arm 86 has a pin 88"projccting leftward therefrom into the path of the arm 80. the construction being such that when said arm 80 is moved couliter-clockwise from the normal position shown in the drawing. its motion will be communicated to the arms 86 and 87; but said arm 80 can move clockwise. independently of said arms 86 and 87. Arm 87 has at its lower end a pivot 91) for a long link orbar 91. which extends thence rearward and upward to near the upper left-hand cornor of the box 47. At its upper part this link 91 has extending lengthwise thereof a slot 92 through which passes a headed stud 9Z3 projecting fixedly from the wall of the is pulled forward and downward by the arm 87, the cam edge 94 acting on this roller depresses the arm to disconnect the clutch and open the circuit.

A spring 96, connected at one end to a pin 97 of the arm 87 and at the other end to a post 98 projecting from the wall of the box der the pull of this spring 96 will be communicated through the pin 88 to the arm and from that back to the slide rod 63 at the side of the carriage.

The means for tripping the latch 52 to set the carriage return mechanism into operation includes a link 100 which at its rear end hooks over a headed stud 101 on said latch, said link being normally urged toward the rear and somewhat downward by means of a spring 102 connected at one end to the link and at the other end to a station ary post 103. The forward end of the link 100 is pivoted at 104 to the vertical arm 105 of a bell crank having also a horizontal arm 106, this bell crank being pivoted on a rock shaft 107. which rock shaft is journaled in twolugs 108 east on the underside of the. box 47, the arm 105 projecting through a suitable hole in the floor of the box. This bell crank has a hub 110 which is loosely mounted on the shaft 107. A fixed post 109 limits the motion of the arm 105 under the pull of spring 102.

The arm 106 is pivoted at 111 to the lower end of a vertical link 112 which at its up per end has a keyhole slot 113 in which is a headed stud 114 projecting from the side of the lever arm 78, hereinbefore described. \Vhen the parts are in their normal positions the stud 114 is at the bottom' of the slot 113,.the parts being arrested in that position by the engagement of the arm 105 with the post 109.

It will be perceived that this whole train of linkage. including the slide rod (-33 and all the parts connected therewith. are under i'he control of the two springs 96 and 10;. the first of which tends to move the rod 63 toward the left and the other of which tends to move said rod toward the right. and'cach of these springs acts on parts having limited motion. The result is that the rod 6;) stands normallv in the intermediate position shown in the drawings where neither of the arms 73 and 74 is in contact with the bracket 64.

The operation of the mechanism will no doubt be plain from the preced ng description. Vhen in the leftward travel of the carriage the margin stop 7 encounters the arm 73 and pushes it leftward. the arm 78 is pressed downward, with the result that the arm is moved slightly away from the pin 88 and the. bar 91 is not disturbed, but the pin 114 pushes downward on the link 112 and thus .trips the latch 52. The arm 50, rising. under the pressure of the spring 42, closes the circuit through the motor an closes the clutch, with the result that the carriage is immediately moved toward the right until the margin stop 8 strikes the arm 7 4 and moves it rightward until arrestedby the bracket 64. This rightwardmovement rocks the arms 86 and 87 and operates the slide bar 91, causing the cam 94 to restore the arm 50 to its normal position, thus opening the clutch and circuit. In this operation, the stud 114 on the arm 78, moves upward idly in the slot 113 without disturbing the train of connections to the latch 52.

In the Hart mechanism the bell crank '105, 106 is operated by a vertical link similar to the link 112 but longer and said vertical link is operated by a bell crank andanother slide rod parallel to the rod 63. By my construc- Lion I dispense with this extra slide rod and some of its connections, which results in some simplification of the mechanism. Moreover, Remington typewriters frequentlyl have computing mechanism attached t ereto, and said computing mechanism occupies such position as to leave comparativel little room for these parts at the front of tie carriage; and dispensing with the additional slide rod is advantageous for that reason.

It is desirable, at least in most instances, to provide a carriage return key and connections to trip the latch 52 in case it is desired to return the carriage before the extreme end of the line is reached. The key for this purpose is here shown almost identical with that employed by Hart. It consists of a lever arm 115 lying outside the main framework of the typewriter just at the right of that forwardly projecting portion of the base. 1 which surrounds the keyboard, said lever arm having its forward end formed suitably to be operated by the palm or edge of the hand. The lever 115 has a hub 116 which is mounted on the i'ighthand end of a rock shaft 117, which rock shaft is journaled at its right-hand end 1n the base 1 and said shaft extends entirelyacross the machine through the leftehand part of the base and is connected by a collar and set screw 118 with the short shaft 107, hereinbefore described as being journaled in the lugs 108 and as having the bell crank 105, 106 pivoted thereto. As best shown in Fig. 7, this shaft 107 has a hub 120 fastened thereon by a set screw 121, said hub and the hub 110 occupying the space between the two lugs 108. The hub 120 has rigidly mounted thereon an arm 122 (Fig. 1), and a pin or stud 123 projecting rightward from said arm lies underneath an arm 124 which is integral with the bell crank arms and 106.

The construction is such that when the key 115 is depressed this arm 122 and pin 123 will operate the bell crank 105, .106 and trip the latch 52, but when said bell crank 18 d operated by the link 112 the shaft 107 and the key 115 are not disturbed.

In the Hart mechanism the key lever 115 is guided in a suitable bracket 125 secured by screws 126 to the outside of the base 1, said bracket consisting of a small castin with a slot cut in it to guide the lever and also bored in from the top to make a hole in which is seated a compression returning spring 127. A top plate 128 screwed on to this casting limits the upward motion of the lever. I have not shown this device in all its details for, so far as my invention is concerned any suitable guide and returning spring can be, provided for this ever arm.

It has been mentioned that preferably when the shaft 41 is rocked to bring the carriage return mechanism into action, the parts are so timed as to close the circuit before the clutch members have come into engagement. This mode of operation introduces into the mechanism the possibility of a minor unis-operation. \Vhen the carriage is restored and the bar 91 is pulled down to its forward position, the cam edge 94 first depresses the roller 95 and then the bar moves a little further, said roller running on the parallel edge of the bar which acts as a dwell. When the operator begins to write on the-machine the carriage steps one letter space at a moves back toward its normal position in unison with the travel of the carriage, the Ynotion (if this bar being of. an extent equal to several letter spaces. this backward travel there will come a .time when the dwell part of the cam has passed from over the roller 95 but the cam itself is not completely restored to normal position. If at that time the operator should inadvertently or accidentally depress the key 115 and therebp release the latch 52, the arin 50 would rise ut not to its full extent,

and it might happen that it would rise high enough to close the circuit but not hi h enough properly to close the clutch. The motor would then race, having no load on it and the operator might not know just what to do under those conditions. In order to prevent this mis-operation, Hart provided a lock for the latch 52, which look was controlled by the bar 91 in such fashion that it was impossible to trip said latch until said bar 91 was practicallyv wholly restored to its normal position. In order to avoid injury to the parts under those conditions, Hart provided a tion between the ke shaft 117. One of t lever 115 and the rock e features of my. invenleftward time and the bar 91 v In the course ofv flexible or yielding connec- Fit) tion is to provide an improved means to take care of this contingency w1thout lookm the latch and without the necessity tor a flexible connection to the key 115.

To this end provision is made for in offeet unhooking the link 100 from the stud 101 during the time when the mis-op'eration above referred to is liable to occur. This can he done in various ways. As here shown, the link 100, where it engages the stud 101, is made with an angled slot 130, said slot consisting of a forward vertical branch and an upper rcarwardly extending horizontal branch; and the mechanism is so contrived that normally said link occupies its upper position shown int the drawing where the vertical part of the slot engages the stud and where therefore the link is operative to trip the latch, but as .soon as the bar 91 moves forward the link drops down until the horizontal part of the slot engages the stud so that if at that time the key be operated the link will move idly over the stud and will not trip the latch" Said link 100 has a pin or stud 131 projecting rightward therefrom and this pin normally rests on a ledge 132 on the bar 91 and it is this ledge acting on the stud that normally holds the link up in its operative position. When in the return motion of the carriage the bar 91 pulled forward and downward, the ledge 132 moves away from the pin 131 and allows the link to drop to its lower position where it is inoperative. and this link remains inoperative until in the let'twa-lid travel of the carriage, and in about the last letter space step of the bar 91, the ledge 132 again lifts the pin 131 and link 100 to operative posi-' tion. Preferably the spring 102 has a downward inclination to assist the. dropping of the link to its inoperative position. To prevent friction at 101, 130 so as to leave the link tree to drop down. is one reason why the stop 109 is provided forthe bell crank 105. 106.

As far as I am aware, itis new to have a link or other device. which. is designed to set the carriage return mechanism in oper ation, so connected that it is unhooked and thereby disabled during the first few steps of the travel of the carriage so as to disconnect the carriage return key at that time and thus make it inoperative.

The drawings show a shaft 133 parallel with the rod 63. Said shaft is a part of the Hart mechanism and is not concerned with the present invention.

' Various changes may be made in the'details'ot' construction and arrangement without departing from my invention.

\Vhat I claim as new and desire to secure by Letters Patent is:

1. In a typewrit'ing machine. the combination with a carriage, of carriage return mccllanism comprising power operated means for returningthe carriage a device normally occupying an intermediate position and moved one way from such position by the carriage at the end of its travel in letter feed direction and moved in the opposite direction from normal position by said carriage at the end of its return travel, means operated by the first said motion of said device for bringing the power mechanism into operation to return the carriage, and means operated by the second said motion of said device to put the power mechanism out of operation.

2. In a typewriting machine, the combination with a carriage and adjustable margin stops, of a device normally occupying an intermediate position and adapted to be moved in one direction from such position by one of said stops and in the-opposite direction from such normal position by the other of said stops and in each such motion to arrest the carria e, power mechanism, means operated by the first said motion of said device to bring the power mechanism into operation to return the carriage, and means operated by the second said motion to throw the power mechanism out of opera tion.

3. In a typewriting machine, the combination with a carriage and two margin stops thereon, of power mechanism, a slide bar having parts adapted to he struck by said mar in stop, said slide bar having limited motlon in both directions from a normal intermediate position, a spring-restored device operated by one of the said motions of said slide bar for bringing the power mechanism into operation to return the carriage. and a second spring restored device operated by the second said motion of said slide bar for throwing the power mechanism out of operation.

4. In a typewriting machine, the combine. tion with a carriage, margin stops carried thereby, and a motor for returning the carriage, of a spring returned device for bringing said motor into action to return thecarriage, a second spring restored device for throwing said motor out of action each of said devices provided with i'neans to arrest its motion under the power of its restoring spring, and a part connected with both said spring restored devices so as normally to be held thereby in an intermediate position, one of said margin stops moving said device one way'from said position to bring the motor into action and the other stop moving said part in the opposite direction from its normal position to throw said m0- tor out of action.

5. In a typewriting machine, the combination with a carriage, of motor mechanism for returning the carriage and including a spring closed clutch, a latch normally holding said clutch open, a device adapted when operated to open said clutch, spring means for restoring said device, means for limiting the motion of said device under the power of said spring means, a spring restored means for-tripping said latch, said means having limited motion under the power of its restoring spring, a part held in a normal intermediate position by the two said spring restored devices, a mar in stop adapted to move said device in one.- irection from its said normal position to trip said latch, and another margin stopadapted to move said device in the other direction from said normal position to operate said clutchopening device. i 6. In atypewriting machine, the combination with the carriage and power operated mechanism for returning the carriage, of a carriage returning key, means operate said key for bringing said power mechanism into operation, said means including a hooklike device, and means for unhooking said device under the control of the carriage so as to render said key inoperative eta certain position of said carriage. V

7. In a typewriting machine, the combination with the carriage and power operated mechanism for returning said carriage, of a carriage returning key, means operated by said he through intermediate connections for ringing said power operated mechanism into operation, and means controlled by the carriage through a predetermined portion of its letter-feed travel for breaking the train of connections between said'key and said means.

8. In a typewriting machine, the combination with the carriage, of an electric motor for returning the carriage, a drive train from said motor to said carriage including a clutch, a circuit breaker for the motor cir cuit, a carriage return key, meinis controlled by said key for first closing said circuit and immediately thereafter closing said clutch, means operated by the carriage for opening said clutch and circuit, and means controlled by said circuit and clutclropening means for disconnecting two of the parts'operated by said key whereby when said clutch opening means-is out of normal position, said key is disconnected from the means whereby it closes the circuit and clutch.

9. In a typewriting machine, the combination with a carriage, power mechanism for .di'iving said carriage, means including a latch 52 for bringing said power mechanism into operation, and means including a bar 91 for throwin said power mechanism out of operation, oi a link having hook-like d by weaves connection with said latch, and means 131, W

132 whereby said bar 91 controls the hooking-up and unhooking of said connection.

10. In a typewriting machine, the combination with a carriage, power mechanism for driving said carriage, means including a latch 52 for bringing said power mechanism into operation, and means including a bar 91 for throwing said power mechanism out of operation, of a link 100 having hoolilike connection with said latch, said connection having a part resting on said bar 91 which thereby normally holds said connection hookedup but allows said connection to be. unhooked-when said bar 91 is operated.

11. In a typewriting machine, the combination with a carriage, carriage return mechanism comprising power-operated means for returning the carriage, spring operated means -for bringing said power operated means into operation and a latch for said spring operated means, of a device normally occupying an intermediate position and moved one way from such position by the carriage atthe end of its travel in letter feed direction and moved in the opposite direction from normal position by said carriage at the end of its return travel, means operated by the first said motion of said device for tripping said latch to bring the powermechanism into operation to return a the carriage, and means operated by the second said motion of said device to move sa.d spring operated means to put the power mechanism out of operation.

12. In a typewriting machine, the combination with a carriage, of carriage return mechanism comprising power operated means for returning the carriage, a device normally occupying an intermediate position and moved one way from such position by the carriage at the end of its travel in letter feed direction and moved intheopposite direction from normal position by said carriage at the end of its return travel, means operated by the first said motion of said device for'bringing the power mecha nism into operation to return the carriage,

means operated by the second saidmotion" 

